The support for ARM/PowerPC has only been lightly tested. It mightcrash and burn your system, make your hair curl, frigthen your cat andgive you sleepless nights. You have been warned !

On PowerPC watch out for the following warning:

__do_IRQ called for irq X. PREEMPT_RT will crash your system soon.

__do_IRQ is deprecated and -rt does not support it anymore. Most ofthe PowerPC subarchitectures do not longer use it, but you might beunlucky and hit one of the remaining users. RT will spit out themessage above and then do what it said. :)